cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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flexfilelayoutxdr.c (2810B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
      4 */
      5#include <linux/sunrpc/svc.h>
      6#include <linux/nfs4.h>
      7
      8#include "nfsd.h"
      9#include "flexfilelayoutxdr.h"
     10
     11#define NFSDDBG_FACILITY	NFSDDBG_PNFS
     12
     13struct ff_idmap {
     14	char buf[11];
     15	int len;
     16};
     17
     18__be32
     19nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
     20		struct nfsd4_layoutget *lgp)
     21{
     22	struct pnfs_ff_layout *fl = lgp->lg_content;
     23	int len, mirror_len, ds_len, fh_len;
     24	__be32 *p;
     25
     26	/*
     27	 * Unlike nfsd4_encode_user, we know these will
     28	 * always be stringified.
     29	 */
     30	struct ff_idmap uid;
     31	struct ff_idmap gid;
     32
     33	fh_len = 4 + fl->fh.size;
     34
     35	uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
     36	gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
     37
     38	/* 8 + len for recording the length, name, and padding */
     39	ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
     40		 8 + uid.len + 8 + gid.len;
     41
     42	mirror_len = 4 + ds_len;
     43
     44	/* The layout segment */
     45	len = 20 + mirror_len;
     46
     47	p = xdr_reserve_space(xdr, sizeof(__be32) + len);
     48	if (!p)
     49		return nfserr_toosmall;
     50
     51	*p++ = cpu_to_be32(len);
     52	p = xdr_encode_hyper(p, 0);		/* stripe unit of 1 */
     53
     54	*p++ = cpu_to_be32(1);			/* single mirror */
     55	*p++ = cpu_to_be32(1);			/* single data server */
     56
     57	p = xdr_encode_opaque_fixed(p, &fl->deviceid,
     58			sizeof(struct nfsd4_deviceid));
     59
     60	*p++ = cpu_to_be32(1);			/* efficiency */
     61
     62	*p++ = cpu_to_be32(fl->stateid.si_generation);
     63	p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
     64				    sizeof(stateid_opaque_t));
     65
     66	*p++ = cpu_to_be32(1);			/* single file handle */
     67	p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
     68
     69	p = xdr_encode_opaque(p, uid.buf, uid.len);
     70	p = xdr_encode_opaque(p, gid.buf, gid.len);
     71
     72	*p++ = cpu_to_be32(fl->flags);
     73	*p++ = cpu_to_be32(0);			/* No stats collect hint */
     74
     75	return 0;
     76}
     77
     78__be32
     79nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
     80		struct nfsd4_getdeviceinfo *gdp)
     81{
     82	struct pnfs_ff_device_addr *da = gdp->gd_device;
     83	int len;
     84	int ver_len;
     85	int addr_len;
     86	__be32 *p;
     87
     88	/* len + padding for two strings */
     89	addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len;
     90	ver_len = 20;
     91
     92	len = 4 + ver_len + 4 + addr_len;
     93
     94	p = xdr_reserve_space(xdr, len + sizeof(__be32));
     95	if (!p)
     96		return nfserr_resource;
     97
     98	/*
     99	 * Fill in the overall length and number of volumes at the beginning
    100	 * of the layout.
    101	 */
    102	*p++ = cpu_to_be32(len);
    103	*p++ = cpu_to_be32(1);			/* 1 netaddr */
    104	p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
    105	p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
    106
    107	*p++ = cpu_to_be32(1);			/* 1 versions */
    108
    109	*p++ = cpu_to_be32(da->version);
    110	*p++ = cpu_to_be32(da->minor_version);
    111	*p++ = cpu_to_be32(da->rsize);
    112	*p++ = cpu_to_be32(da->wsize);
    113	*p++ = cpu_to_be32(da->tightly_coupled);
    114
    115	return 0;
    116}